Nailing block



Aug. 28, 1928. 1,682,662

, s. o. BUTTIERWOYRTH NAILING BLOCK Filed Aug. 20, 1926 INVENTOR.

4 firmer] 2 ft ATTORNEY.

Patented Aug. 28, 1928.

UNITED STATES PATENT OFFICE.

SAMUEL ID. BUTTERWORTH, OF MIAMI BEACH, FLORIDA.

NAILING BLOCK.

Application filed August 20, 1926 Serial No. 130,382.

This invention relates to wall structures and has to do more particularly with a nailing block which is useful in securing esterior arts to awall of fireproof construction.

It as been the practice heretofore to place wooden nailing blocks in a fireproof wall structure for the purpose of receiving nails for anchoring to the wall structure such parts as the plaster ground and base-board. These wooden blocks are placed between slabs of structural material, and are surrounded by such mortar, cement, and plaster as is used.

This practice is objectionable because the anchored parts become loose after a period of time. The wooden blocks are in a moist and swelled condition at the time the nails are driven into them by reason of being surrounded by the wet mortar, cement, or plaster. After a period of time the blocks become dried out, and the base-board or other part anchored by the nails, becomes loose.

It is an object of this invention to provide a nailing block which overcomes the objections to the wooden block. The nailing block of this invention is made of metal, and it is adapted to be placed in a wall structure in a manner similar to the way in which a. wooden block is placed in a wall structure. The metal block includes opposed nail gripping members between which a nail can e driven. Preferably a serrated nail is used with the block and the opposed gripping members grip the nail in a serrat-ion, and securely hold it in place. The metal parts of the block are arranged so as to guide the nail to proper position even though it be driven to one slde of the proper position for entering between the gripping members. 7

In the accompanying drawings:

Fig. 1 is a perspective view of a wall structure with parts cut away, showing the block disposed in the wall structure between two slabs of structural material.

Fig. 2 is a sectional view showing how the plaster ground and the base-board are secured to the fireproof wall structure.

Fig. 3 is a perspective view of a metal block constructed according to the invention.

A fireproof wall structure is shown in Fig. 1, and the structure is made up in awell known manner of structural blocks 1. Between the blocks is a layer of mortar or cement 2. Over the surface of the wall is a layer of plaster 3.

In some wall structures a plaster ground is used. This ground may be in the form of two boards 5 and 5* running around the lower edge of the wall as shown in the drawing. A base-board 6 covers the plaster ground and also the lower port-ion of the plaster.

A metal nailing block 10, disposed between the structural slabs, and the plaster grounds areanchored to the wall structure by nails 11 which are driven through and into the metal nailing blocks. The base board-6 is anchored to the wall structure by nails 12 which are driven into the grounds.

A satisfactory form of metal nailing block is shown in Fig. 3. This block consists of two pieces of sheet metal, each having a convex surface. These pieces of metal are secured together, as by means of rivets13, with the convex surfaces facing eachjot-he'r. The edges of each metal piece are turned over as at 14, so that the extreme edges of one piece contact with, or lie close to, the turned -over edges of the other piece. These edges are turned through an angle of morethan 90 so that a V-shaped entrance is provided for the nails.

The nails which secure the plaster ground are driven through these members and in between the inturned edges of the metal pieces which form the nailing block. The V-shaped entrance, provided by the inturned edges, guides the nails so that they are caused to enter between the edges. As a nail is driven into the block the gripping edges are distorted somewhat, or forced outwardly, and by reason of the resilient nature of the sheet metal, the nail is tightly gripped between the gripping edges.

- The nailing block shown and described herein is of a double arrangement, in that it has a width which is equal to, or substantially equal to, the thickness of the blocks which form the fireproof wall structure. Such a nailing block can be used for the securing of V the plaster board and base-board onboth sides of the wall. It will be observed that the nailing block has concave outer sides and the mortar or cement enters in the pocket which is formed between a structural block and the concave surface, thus aiding in imbedding the block in the wall. lVhile this is perhaps desirable, it is not necessary in a metal nailing block.

Serrated nails are preferably used with this type of block. Ordinary commercial wire nails are serrated or roughened for a portion of their length and it is preferable to use such a nail with the block although the metal block may be constructed so as to have a grip which is sufficient to hold a smooth nail in position.

The manner in which the nailing block is constructed is not important so long as the final product possesses nail gripping characteristics. For instance, the two metal pieces may be fully shaped before they are riveted together, or the metal strip may be riveted together While in a flat condition, and then the gripping edges may be turned inwardly against each other thus causing the flat strips to take a curved shape. Moreover, it is not essential that the strip have a concave surface, nor is it essential to make the nailing block so that nails can be driven into both sides, for in some ca ses it may be desirable to use a block wherein nails are to be driven in one side.

I claim 1. A nailing block comprising a. pair of oppositely disposed metal members, these members being spaced apart near their edges and having their edges turned over toward each other and into substantially abutting relation to form directly opposed nail gripping members. V

A metal nailing block comprising a pair of longitudinally curved members secured to gether with their convex surfaces disposed inwardly, the edges being turnedover through an angle of more than 90 so as to form' opposed nail gripping members, these edges cooperating to form a V-shape entrance for a nail.

3. A metal nailing block comprising two metal portions which contact with each other and which diverge from each other from this point of contact so that their edges are spaced apart, and both the edges being turned over toward each other through an angle of more than 90 and in substantial contact to form nail gripping members.

t. A metal nailing block comprising two metal portions which contact with each other, means securely fixing the members together substantially at the point of contact, said members diverging from each other from this point of contact so that their edges are spaced apart, and their edges being turned over through an angle of more than 90 to form nail gripping members.

5. A metal nailing block comprising a pair of sheet metal members securely fixed together along their center line, these sheet metal members diverging from each other on both sides 0 l the center line so that their edges are spaced apart, their edges being turned over toward each other through an angle of more than 00 to form nail gripping members on each side of the block.

In testimony whereof I affix my si nature.

SAMUEL n. nUtrrERWoirrH. 

